CN105047175B - Display device and its driving method - Google Patents
Display device and its driving method Download PDFInfo
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- CN105047175B CN105047175B CN201510593223.8A CN201510593223A CN105047175B CN 105047175 B CN105047175 B CN 105047175B CN 201510593223 A CN201510593223 A CN 201510593223A CN 105047175 B CN105047175 B CN 105047175B
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- liquid crystal
- time schedule
- electric field
- schedule controller
- crystal panel
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
Abstract
The invention discloses a kind of display device and its driving method, belong to display technology field, solve in the prior art because internal electric field causes the picture of display the technical problem of ghost occur.The display device includes liquid crystal panel, time schedule controller and voltage detector；The voltage detector is used for the internal electric field for detecting the liquid crystal panel；The time schedule controller adjusts simultaneously output polarity reverse signal, to eliminate the internal electric field of the liquid crystal panel according to the testing result of the voltage detector.
Description
Technical field
The present invention relates to display technology field, specifically, is related to a kind of display device and its driving method.
Background technology
With the development of Display Technique, liquid crystal display has become most commonly seen display device.In liquid crystal display
In, liquid crystal is driven by the voltage difference between pixel electrode and public electrode, so as to realize the display of image.
But in the manufacturing process of liquid crystal, influenceed by factors such as environment, equipment, it is impossible to obtain Economical Purification
Liquid crystal, so inevitably remaining some removable ions in liquid crystal.On the other hand, in current liquid crystal display all
Using inversion driving mode, i.e. the current potential of pixel electrode is positive and negative alternately change, then between pixel electrode and public electrode
Positive polarity voltage difference can be alternately present and reverse voltage is poor.
But the size of positive polarity voltage difference and reverse voltage difference can not possibly be essentially equal, this can cause driving voltage
Waveform in contain certain flip-flop.Now, the ion in liquid crystal will tend to the opposite polarity with the flip-flop
Direction motion, cation and anion can be respectively moved to the upper alignment films of liquid crystal panel and lower alignment films, in liquid crystal panel
It is internally formed internal electric field.The internal electric field can influence arrangement and the transmissivity of liquid crystal, cause the picture of display the technology of ghost occur
Problem.
The content of the invention
It is an object of the invention to provide a kind of display device and its driving method, to solve in the prior art due to interior electricity
Field causes the picture of display the technical problem of ghost occur.
The present invention provides a kind of display device, including liquid crystal panel, time schedule controller and voltage detector；
The voltage detector is used for the internal electric field for detecting the liquid crystal panel；
The time schedule controller is adjusted and output polarity reverse signal according to the testing result of the voltage detector, with
Eliminate the internal electric field of the liquid crystal panel.
Preferably, the voltage detector connects the upper alignment films in the liquid crystal panel and lower alignment films.
Preferably, the liquid crystal panel is vertically aligned liquid crystal panel.
It is further to be provided with threshold value in the time schedule controller；
The time schedule controller is according to the testing result of the voltage detector and the magnitude relationship of the threshold value, and regulation is simultaneously
Output polarity reverse signal, to eliminate the internal electric field of the liquid crystal panel.
The present invention also provides a kind of driving method of above-mentioned display device：
The polarity inversion signal of the time schedule controller output is frame reverse signal, and according to the inspection of the voltage detector
Result regulation and output frame reverse signal are surveyed, to eliminate the internal electric field of the liquid crystal panel.
Preferably, the testing result is the difference of the absolute value and the absolute value of negativity internal electric field of positivity internal electric field.
It is further to be provided with threshold value in the time schedule controller；
The time schedule controller adjusts according to the testing result and the magnitude relationship of the threshold value and output polarity inverts
Signal, to eliminate the internal electric field of the liquid crystal panel.
It is further that, when the testing result is more than zero and the not up to threshold value, the time schedule controller is one
Increase the frame polarity inversion signal of interpolation one in framing reverse signal；
When the testing result reaches the threshold value, the time schedule controller increases by two frames in a framing reverse signal
Interpolation polarity inversion signal.
Preferably, the framing reverse signal includes 10 to 20 frame reverse signals.
Present invention offers following beneficial effect：In display device provided by the invention, by setting voltage detector pair
The internal electric field of liquid crystal panel is detected, and time schedule controller can be adjusted and defeated according to the testing result of voltage detector
Go out polarity inversion signal.When voltage detector detects that the internal electric field of liquid crystal panel is larger, time schedule controller just can be to pole
Sex reversal signal is adjusted and exported accordingly, to eliminate the internal electric field of liquid crystal panel, so as to effectively solve liquid crystal
There is the technical problem of ghost in the picture that showing device is shown.
Other features and advantages of the present invention will be illustrated in the following description, also, partial becomes from specification
Obtain it is clear that or being understood by implementing the present invention.The purpose of the present invention and other advantages can be by specification, rights
Specifically noted structure is realized and obtained in claim and accompanying drawing.
Brief description of the drawings
In order to it is clearer explanation the embodiment of the present invention in technical scheme, in being described below to embodiment required for
Accompanying drawing does simple introduction：
Fig. 1 is the schematic diagram of liquid crystal panel and voltage detector in display device provided in an embodiment of the present invention；
Fig. 2 is the comparison of wave shape figure in driving method provided in an embodiment of the present invention.
Embodiment
Embodiments of the present invention are described in detail below with reference to drawings and Examples, and how the present invention is applied whereby
Technological means solves technical problem, and the implementation process for reaching technique effect can fully understand and implement according to this.Need to illustrate
As long as not forming conflict, each embodiment in the present invention and each feature in each embodiment can be combined with each other,
The technical scheme formed is within protection scope of the present invention.
The embodiment of the present invention provides a kind of display device, including liquid crystal panel, time schedule controller (Timing
Controller, abbreviation T-CON) and voltage detector.Wherein, voltage detector is used for the internal electric field for detecting liquid crystal panel, when
Sequence controller adjusts simultaneously output polarity reverse signal (Polarity inversion according to the testing result of voltage detector
Signal, abbreviation POL), to eliminate the internal electric field of liquid crystal panel.
The present embodiment is illustrated with being arranged vertically exemplified by (Vertical Alignment, abbreviation VA) type liquid crystal panel.
Liquid crystal panel mainly includes array base palte, color membrane substrates, and the liquid crystal being filled between array base palte and color membrane substrates, such as schemes
Shown in 1, pixel electrode 11 and lower alignment films 12 are arranged on array base palte, and public electrode 21 and upper alignment films 22 are arranged on color film
On substrate, liquid crystal (not shown) is filled between upper alignment films 22 and lower alignment films 12, and can in the presence of some in liquid crystal
Mobile ion.The upper alignment films 22 of the connection of voltage detector 3 and lower alignment films 12, to detect upper alignment films 22 and lower alignment films 12
Between voltage difference, i.e. liquid crystal panel internal electric field.
In the present embodiment, threshold value is provided with time schedule controller, time schedule controller is according to the detection knot of voltage detector 3
Fruit and the magnitude relationship of threshold value, simultaneously output polarity reverse signal is adjusted, to eliminate the internal electric field of liquid crystal panel, so as to avoid ghost
Appearance.
The embodiment of the present invention additionally provides the driving method of above-mentioned display device, time schedule controller pair described in detail below
The regulation of polarity inversion signal and the way of output：
In the present embodiment, the polarity inversion signal of time schedule controller output is frame reverse signal.Such as the waveform a institutes in Fig. 2
Show, each frame inverts the polarity of the voltage of a pixel electrode.From waveform a as can be seen that all odd-numbered frame (f1, f3,
F5 ... f19) in the voltage of pixel electrode be negative polarity, pixel electrode in all even frames (f2, f4, f6 ... f20)
Voltage be positive polarity.
In odd-numbered frame, between pixel electrode and public electrode formed negativity electric field, and the ion in liquid crystal will to
The opposite direction motion of the negativity electric field, so cation therein can be moved to lower alignment films, anion can be moved to and take
To film.These ions are formed the internal electric field of liquid crystal panel, and that formed in odd-numbered frame is positivity internal electric field Δ V+.
In even frame, positivity electric field is formed between pixel electrode and public electrode.Based on identical principle, in liquid crystal
Ion can form negativity internal electric field Δ V- in even frame.
In driving method provided in an embodiment of the present invention, time schedule controller is according to the testing result of the voltage detector
Simultaneously output frame reverse signal is adjusted, to eliminate the internal electric field of the liquid crystal panel.Testing result therein is positivity internal electric field
Absolute value | Δ V+ | the absolute value with negativity internal electric field | Δ V- | difference.
As a preferred scheme, threshold value Vth is provided with time schedule controller, time schedule controller is according to voltage detector
Testing result and threshold value magnitude relationship, adjust and output polarity reverse signal, to eliminate the internal electric field of liquid crystal panel, so as to
Avoid the appearance of ghost.
Assuming that | Δ V+ |>| Δ V- | in the case of, then using | Δ V+ |-| Δ V- | it is used as testing result.Time schedule controller
Will basis | Δ V+ |-| Δ V- | the magnitude relationship between Vth, adjust and output polarity reverse signal.
In the present embodiment, time schedule controller is to the specific regulation of polarity inversion signal and the way of output：
When testing result is more than zero and not up to threshold value, i.e., when (| Δ V+ |-| Δ V- |)<During Vth, time schedule controller exists
Increase the frame polarity inversion signal of interpolation one in one framing reverse signal.Wherein, 10 to 20 are generally included in a framing reverse signal
Individual frame reverse signal, 20 frame reverse signals are as a framing reverse signal in the present embodiment.
As shown in the waveform b in Fig. 2, between the 10th frame (f10) therein and the 11st frame (f11) with regard to interpolation one frame polarity
Reverse signal so that in the 10th frame and the 11st frame, the voltage of pixel electrode is in continuously positive polarity.Due in | Δ V+ |>|ΔV-
| in the case of, the internal electric field of liquid crystal panel is positivity internal electric field, therefore between pixel electrode and public electrode in two continuous frames
The positivity electric field that output is formed can just eliminate the positivity internal electric field.
In addition, in interpolation after polarity inversion signal, the sum of the framing reverse signal becomes for 21.Also, from
11st frame starts, and is respectively formed positivity electric field in odd-numbered frame afterwards between pixel electrode and public electrode, and pixel in even frame
Negativity electric field is respectively formed between electrode and public electrode.
When testing result reaches threshold value, i.e., when (| Δ V+ |-| Δ V- |)>During Vth, then it represents that the intensity of internal electric field compared with
Greatly, therefore time schedule controller increases by two frame interpolation polarity inversion signals in a framing reverse signal.
As shown in the waveform c in Fig. 2, the first frame polarity inversion of interpolation between the 8th frame (f8) therein and the 9th frame (f9)
Signal, the second frame polarity inversion signal of interpolation between the 17th frame (f17) and the 18th frame (f18).Therefore, in the 8th frame and the 9th frame
In, and in the 17th frame and the 18th frame, the positivity electric field of two continuous frames can be formed between pixel electrode and public electrode, so as to
The stronger positivity internal electric field of liquid crystal panel can be eliminated.
In addition, in interpolation after two frame polarity inversion signals, the sum of the framing reverse signal becomes for 22.From
9 frames start, and are respectively formed positivity electric field in odd-numbered frame afterwards between pixel electrode and public electrode, and pixel electrode in even frame
Negativity electric field is respectively formed between public electrode.Also, since the 18th frame, pixel electrode and common electrical in odd-numbered frame afterwards
It is negativity electric field to have reply between pole, and positivity electric field is also reverted between pixel electrode and public electrode in even frame.
If in | Δ V+ |<| Δ V- | in the case of, then using | Δ V- |-| Δ V+ | it is used as the detection knot of voltage detector
Fruit.Time schedule controller will basis | Δ V- |-| Δ V+ | the magnitude relationship between Vth, adjust and output polarity reverse signal.
Simultaneously as negativity internal electric field can be formed in liquid crystal panel now, so the interpolation polarity inversion letter of time schedule controller output
Number it should also be as being adjusted so that the negativity electric field of two continuous frames can be formed between pixel electrode and public electrode, so as to
Enough eliminate the negativity internal electric field of liquid crystal panel.
In other embodiments, more different size of threshold values can also be set in time schedule controller, so that will
The testing result of voltage detector is divided into more kinds of situations, and can according to testing result in a framing reverse signal interpolation
3 frames or more multiframe polarity inversion signal, in order to internal electric field that is more accurate, effectively eliminating liquid crystal panel.
It should be noted that the size of above-mentioned threshold value, quantity, and the quantity of a framing reverse signal, interpolation polarity
The parameters such as the quantity of reverse signal, set according to model, the specification of different liquid crystal display devices itself, therefore more than
Parameters can be configured according to being actually needed, and be not limited to the scope of description of the embodiment of the present invention.
While it is disclosed that embodiment as above, but described content only to facilitate understand the present invention and adopt
Embodiment, it is not limited to the present invention.Any those skilled in the art to which this invention pertains, this is not being departed from
On the premise of the disclosed spirit and scope of invention, any modification and change can be made in the implementing form and in details,
But the scope of patent protection of the present invention, still should be subject to the scope of the claims as defined in the appended claims.
Claims (6)
1. a kind of display device, including liquid crystal panel, time schedule controller and voltage detector；
The voltage detector is used for the internal electric field for detecting the liquid crystal panel；
The time schedule controller adjusts simultaneously output polarity reverse signal, to eliminate according to the testing result of the voltage detector
The internal electric field of the liquid crystal panel；
Wherein, it is provided with threshold value in the time schedule controller；
The time schedule controller is adjusted and exported according to the testing result of the voltage detector and the magnitude relationship of the threshold value
Polarity inversion signal, to eliminate the internal electric field of the liquid crystal panel；
When the testing result is more than zero and the not up to threshold value, the time schedule controller increases in a framing reverse signal
Add the frame polarity inversion signal of interpolation one；
When the testing result reaches the threshold value, the time schedule controller increases by two frame interpolations in a framing reverse signal
Polarity inversion signal.
2. display device according to claim 1, it is characterised in that the voltage detector is connected in the liquid crystal panel
Upper alignment films and lower alignment films.
3. display device according to claim 1, it is characterised in that the liquid crystal panel is vertically aligned liquid crystal surface
Plate.
A kind of 4. driving method of display device as described in any one of claims 1 to 3：
The polarity inversion signal of the time schedule controller output is frame reverse signal, and according to the detection knot of the voltage detector
Fruit regulation and output frame reverse signal, to eliminate the internal electric field of the liquid crystal panel；
Wherein, it is provided with threshold value in the time schedule controller；
The time schedule controller adjusts according to the testing result and the magnitude relationship of the threshold value and output polarity reversion is believed
Number, to eliminate the internal electric field of the liquid crystal panel；
When the testing result is more than zero and the not up to threshold value, the time schedule controller increases in a framing reverse signal
Add the frame polarity inversion signal of interpolation one；
When the testing result reaches the threshold value, the time schedule controller increases by two frame interpolations in a framing reverse signal
Polarity inversion signal.
5. driving method according to claim 4, it is characterised in that the testing result is the absolute value of positivity internal electric field
With the difference of the absolute value of negativity internal electric field.
6. driving method according to claim 4, it is characterised in that the framing reverse signal includes 10 to 20
Frame reverse signal.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510593223.8A CN105047175B (en) | 2015-09-17 | 2015-09-17 | Display device and its driving method |
| PCT/CN2015/092012 WO2017045239A1 (en) | 2015-09-17 | 2015-10-15 | Display device and driving method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510593223.8A CN105047175B (en) | 2015-09-17 | 2015-09-17 | Display device and its driving method |
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| CN105047175A CN105047175A (en) | 2015-11-11 |
| CN105047175B true CN105047175B (en) | 2018-03-30 |
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| WO (1) | WO2017045239A1 (en) |
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| CN108898998B (en) * | 2018-09-10 | 2021-06-08 | 江苏慧光电子科技有限公司 | Driving method, variable frequency driving method and system, medium and chip |
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| CN1545690A (en) * | 2001-08-24 | 2004-11-10 | 皇家飞利浦电子股份有限公司 | Matrix display device |
| CN101551987A (en) * | 2009-04-24 | 2009-10-07 | 昆山龙腾光电有限公司 | Method and device for eliminating picture residual image |
| CN103048818A (en) * | 2011-10-11 | 2013-04-17 | 株式会社日本显示器东 | Liquid crystal display device |
| CN104867473A (en) * | 2015-06-16 | 2015-08-26 | 深圳市华星光电技术有限公司 | Driving method, driving device and display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3730159B2 (en) * | 2001-01-12 | 2005-12-21 | シャープ株式会社 | Display device driving method and display device |
| JP5629439B2 (en) * | 2009-08-26 | 2014-11-19 | 株式会社ジャパンディスプレイ | Liquid crystal display |
| JPWO2011086743A1 (en) * | 2010-01-14 | 2013-05-16 | シャープ株式会社 | Liquid crystal display |
| CN102411912A (en) * | 2011-04-27 | 2012-04-11 | 深圳市华星光电技术有限公司 | Driving method for liquid crystal display |
| CN104081445B (en) * | 2012-02-10 | 2016-12-14 | 夏普株式会社 | Display device and driving method thereof |
| TWI582509B (en) * | 2012-03-26 | 2017-05-11 | 達意科技股份有限公司 | Electrophoretic display and structure thereof |
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- 2015-09-17 CN CN201510593223.8A patent/CN105047175B/en active Active
- 2015-10-15 WO PCT/CN2015/092012 patent/WO2017045239A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1545690A (en) * | 2001-08-24 | 2004-11-10 | 皇家飞利浦电子股份有限公司 | Matrix display device |
| CN101551987A (en) * | 2009-04-24 | 2009-10-07 | 昆山龙腾光电有限公司 | Method and device for eliminating picture residual image |
| CN103048818A (en) * | 2011-10-11 | 2013-04-17 | 株式会社日本显示器东 | Liquid crystal display device |
| CN104867473A (en) * | 2015-06-16 | 2015-08-26 | 深圳市华星光电技术有限公司 | Driving method, driving device and display device |
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| Publication number | Publication date |
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| WO2017045239A1 (en) | 2017-03-23 |
| CN105047175A (en) | 2015-11-11 |
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